Funciones para trabajar con Polygon

WKT

Devuelve un objeto geométrico WKT (Well Known Text) a partir de varios tipos de datos Geo. Los objetos WKT compatibles son:

POINT
MULTIPOINT
POLYGON
MULTIPOLYGON
LINESTRING
MULTILINESTRING

Sintaxis

WKT(geo_data)

Parámetros

geo_data puede ser uno de los siguientes tipos de datos Geo o uno de sus tipos primitivos subyacentes:

Valor devuelto

Se devuelve el objeto geométrico WKT POINT para un Point.
Se devuelve el objeto geométrico WKT MULTIPOINT para un MultiPoint.
Se devuelve el objeto geométrico WKT POLYGON para un Polygon.
Se devuelve el objeto geométrico WKT MULTIPOLYGON para un MultiPolygon.
Se devuelve el objeto geométrico WKT LINESTRING para un LineString.
Se devuelve el objeto geométrico WKT MULTILINESTRING para un MultiLineString.

Ejemplos

POINT a partir de una tupla:

SELECT wkt((0., 0.));

POINT(0 0)

POLYGON a partir de un array de tuplas o de un array de arrays de tuplas:

SELECT wkt([(0., 0.), (10., 0.), (10., 10.), (0., 10.)]);

POLYGON((0 0,10 0,10 10,0 10))

MULTIPOLYGON a partir de un Array de Arrays de Tuples multidimensionales:

SELECT wkt([[[(0., 0.), (10., 0.), (10., 10.), (0., 10.)], [(4., 4.), (5., 4.), (5., 5.), (4., 5.)]], [[(-10., -10.), (-10., -9.), (-9., 10.)]]]);

MULTIPOLYGON(((0 0,10 0,10 0,10 10,0 10,0 0),(4 4,5 4,5 5,4 5,4 4)),((-10 -10,-10 -9,-9 10,-10 -10)))

readWKTMultiPolygon

Convierte un WKT (Well Known Text) MultiPolygon en un valor del tipo MultiPolygon.

Ejemplo

SELECT
    toTypeName(readWKTMultiPolygon('MULTIPOLYGON(((2 0,10 0,10 10,0 10,2 0),(4 4,5 4,5 5,4 5,4 4)),((-10 -10,-10 -9,-9 10,-10 -10)))')) AS type,
    readWKTMultiPolygon('MULTIPOLYGON(((2 0,10 0,10 10,0 10,2 0),(4 4,5 4,5 5,4 5,4 4)),((-10 -10,-10 -9,-9 10,-10 -10)))') AS output FORMAT Markdown

tipo	salida
MultiPolygon	[[[(2,0),(10,0),(10,10),(0,10),(2,0)],[(4,4),(5,4),(5,5),(4,5),(4,4)]],[[(-10,-10),(-10,-9),(-9,10),(-10,-10)]]]

Parámetros de entrada

Cadena que comienza con MULTIPOLYGON

Valor devuelto

MultiPolygon

readWKTPolygon

Convierte un MultiPolygon en formato WKT (Well Known Text) en un Polygon.

Ejemplo

SELECT
    toTypeName(readWKTPolygon('POLYGON((2 0,10 0,10 10,0 10,2 0))')) AS type,
    readWKTPolygon('POLYGON((2 0,10 0,10 10,0 10,2 0))') AS output
FORMAT Markdown

tipo	salida
Polygon	[[(2,0),(10,0),(10,10),(0,10),(2,0)]]

Parámetros de entrada

Cadena que comienza por POLYGON

Valor devuelto

Polygon

readWKTPoint

La función readWKTPoint de ClickHouse analiza una representación en Well-Known Text (WKT) de una geometría de tipo Point y devuelve un punto en el formato interno de ClickHouse.

Sintaxis

readWKTPoint(wkt_string)

Argumentos

wkt_string: La cadena WKT de entrada que representa una geometría de tipo Point.

Valor devuelto

La función devuelve una representación interna en ClickHouse de la geometría Point.

Ejemplo

SELECT readWKTPoint('POINT (1.2 3.4)');

(1.2,3.4)

readWKTLineString

Analiza una representación en Well-Known Text (WKT) de una geometría LineString y la devuelve en el formato interno de ClickHouse.

Sintaxis

readWKTLineString(wkt_string)

Argumentos

wkt_string: La cadena WKT de entrada que representa una geometría de tipo LineString.

Valor devuelto

La función devuelve una representación interna de ClickHouse de la geometría LineString.

Ejemplo

SELECT readWKTLineString('LINESTRING (1 1, 2 2, 3 3, 1 1)');

[(1,1),(2,2),(3,3),(1,1)]

readWKTMultiLineString

Interpreta una representación en Well-Known Text (WKT) de una geometría MultiLineString y la devuelve en el formato interno de ClickHouse.

Sintaxis

readWKTMultiLineString(wkt_string)

Argumentos

wkt_string: La cadena WKT de entrada que representa una geometría de tipo MultiLineString.

Valor devuelto

La función devuelve la representación interna en ClickHouse de la geometría MultiLineString.

Ejemplo

SELECT readWKTMultiLineString('MULTILINESTRING ((1 1, 2 2, 3 3), (4 4, 5 5, 6 6))');

[[(1,1),(2,2),(3,3)],[(4,4),(5,5),(6,6)]]

readWKTMultiPoint

Analiza una representación de Well-Known Text (WKT) de una geometría MultiPoint y la devuelve en el formato interno de ClickHouse.

Sintaxis

readWKTMultiPoint(wkt_string)

Argumentos

wkt_string: La cadena WKT de entrada que representa una geometría de tipo MultiPoint.

Valor devuelto

La función devuelve una representación interna de ClickHouse de la geometría de multipuntos.

Ejemplo

SELECT readWKTMultiPoint('MULTIPOINT (1 1, 2 2, 3 3)');

[(1,1),(2,2),(3,3)]

readWKTRing

Analiza la representación en Well-Known Text (WKT) de una geometría Polygon y devuelve un anillo (linestring cerrado) en el formato interno de ClickHouse.

Sintaxis

readWKTRing(wkt_string)

Argumentos

wkt_string: La cadena WKT de entrada que representa una geometría de tipo Polygon.

Valor devuelto

La función devuelve una representación interna de ClickHouse de la geometría de anillo (linestring cerrada).

Ejemplo

SELECT readWKTRing('POLYGON ((1 1, 2 2, 3 3, 1 1))');

[(1,1),(2,2),(3,3),(1,1)]

polygonsWithinSpherical

Devuelve true o false según si un polígono está completamente dentro de otro polígono. Referencia: https://www.boost.org/doc/libs/1_62_0/libs/geometry/doc/html/geometry/reference/algorithms/within/within_2.html

Ejemplo

SELECT polygonsWithinSpherical([[[(4.3613577, 50.8651821), (4.349556, 50.8535879), (4.3602419, 50.8435626), (4.3830299, 50.8428851), (4.3904543, 50.8564867), (4.3613148, 50.8651279)]]], [[[(4.346693, 50.858306), (4.367945, 50.852455), (4.366227, 50.840809), (4.344961, 50.833264), (4.338074, 50.848677), (4.346693, 50.858306)]]]);

readWKBMultiPolygon

Convierte un WKB (Well Known Binary) de tipo MultiPolygon en un tipo MultiPolygon.

Ejemplo

SELECT
    toTypeName(readWKBMultiPolygon(unhex('0106000000020000000103000000020000000500000000000000000000400000000000000000000000000000244000000000000000000000000000002440000000000000244000000000000000000000000000002440000000000000004000000000000000000500000000000000000010400000000000001040000000000000144000000000000010400000000000001440000000000000144000000000000010400000000000001440000000000000104000000000000010400103000000010000000400000000000000000024c000000000000024c000000000000024c000000000000022c000000000000022c0000000000000244000000000000024c000000000000024c0'))) AS type,
    readWKBMultiPolygon(unhex('0106000000020000000103000000020000000500000000000000000000400000000000000000000000000000244000000000000000000000000000002440000000000000244000000000000000000000000000002440000000000000004000000000000000000500000000000000000010400000000000001040000000000000144000000000000010400000000000001440000000000000144000000000000010400000000000001440000000000000104000000000000010400103000000010000000400000000000000000024c000000000000024c000000000000024c000000000000022c000000000000022c0000000000000244000000000000024c000000000000024c0')) AS output FORMAT Markdown

tipo	salida
MultiPolygon	[[[(2,0),(10,0),(10,10),(0,10),(2,0)],[(4,4),(5,4),(5,5),(4,5),(4,4)]],[[(-10,-10),(-10,-9),(-9,10),(-10,-10)]]]

Parámetros de entrada

Cadena que empieza por MULTIPOLYGON

Valor devuelto

MultiPolygon

readWKBPolygon

Convierte un MultiPolygon WKB (Well Known Binary) al tipo Polygon.

Ejemplo

SELECT
    toTypeName(readWKBPolygon(unhex('010300000001000000050000000000000000000040000000000000000000000000000024400000000000000000000000000000244000000000000024400000000000000000000000000000244000000000000000400000000000000000'))) AS type,
    readWKBPolygon(unhex('010300000001000000050000000000000000000040000000000000000000000000000024400000000000000000000000000000244000000000000024400000000000000000000000000000244000000000000000400000000000000000')) AS output
FORMAT Markdown

tipo	salida
Polygon	[[(2,0),(10,0),(10,10),(0,10),(2,0)]]

Parámetros de entrada

Cadena que comienza con POLYGON

Valor devuelto

Polygon

readWKBPoint

La función readWKBPoint de ClickHouse analiza una representación Well-Known Binary (WKB) de una geometría de tipo Point y devuelve un punto en el formato interno de ClickHouse.

Sintaxis

readWKBPoint(wkb_string)

Argumentos

wkb_string: la cadena WKB de entrada que representa una geometría de tipo Point.

Valor devuelto

La función devuelve una representación interna de ClickHouse de la geometría de tipo Point.

Ejemplo

SELECT readWKBPoint(unhex('0101000000333333333333f33f3333333333330b40'));

(1.2,3.4)

readWKBLineString

Interpreta una representación en Well-Known Binary (WKB) de una geometría LineString y la devuelve en el formato interno de ClickHouse.

Sintaxis

readWKBLineString(wkb_string)

Argumentos

wkb_string: La cadena WKB de entrada que representa una geometría de tipo LineString.

Valor devuelto

La función devuelve una representación interna de ClickHouse de la geometría de tipo LineString.

Ejemplo

SELECT readWKBLineString(unhex('010200000004000000000000000000f03f000000000000f03f0000000000000040000000000000004000000000000008400000000000000840000000000000f03f000000000000f03f'));

[(1,1),(2,2),(3,3),(1,1)]

readWKBMultiLineString

Analiza la representación Well-Known Binary (WKB) de una geometría MultiLineString y la devuelve en el formato interno de ClickHouse.

Sintaxis

readWKBMultiLineString(wkb_string)

Argumentos

wkb_string: La cadena WKB de entrada que representa una geometría de tipo MultiLineString.

Valor devuelto

La función devuelve la representación interna en ClickHouse de la geometría MultiLineString.

Ejemplo

SELECT readWKBMultiLineString(unhex('010500000002000000010200000003000000000000000000f03f000000000000f03f0000000000000040000000000000004000000000000008400000000000000840010200000003000000000000000000104000000000000010400000000000001440000000000000144000000000000018400000000000001840'));

[[(1,1),(2,2),(3,3)],[(4,4),(5,5),(6,6)]]

Parámetros de entrada

Valor devuelto

UInt8: 0 para false, 1 para true

readWKBMultiPoint

Analiza una representación Well-Known Binary (WKB) de una geometría MultiPoint y la devuelve en el formato interno de ClickHouse.

Sintaxis

readWKBMultiPoint(wkb_string)

Argumentos

wkb_string: La cadena WKB de entrada que representa una geometría MultiPoint.

Valor devuelto

La función devuelve una representación interna de ClickHouse de la geometría multipunto.

Ejemplo

SELECT readWKBMultiPoint(unhex('0104000000020000000101000000000000000000f03f000000000000f03f010100000000000000000000400000000000000040'));

[(1,1),(2,2)]

polygonsDistanceSpherical

Calcula la distancia mínima entre dos puntos, donde uno pertenece al primer polígono y el otro a otro polígono. Esférica significa que las coordenadas se interpretan como coordenadas sobre una esfera pura e ideal, lo cual no se ajusta a la Tierra. El uso de este tipo de sistema de coordenadas acelera la ejecución, pero, por supuesto, no es preciso.

Ejemplo

SELECT polygonsDistanceSpherical([[[(0, 0), (0, 0.1), (0.1, 0.1), (0.1, 0)]]], [[[(10., 10.), (10., 40.), (40., 40.), (40., 10.), (10., 10.)]]])

0.24372872211133834

Parámetros de entrada

Dos polígonos

Valor devuelto

Float64

polygonsDistanceCartesian

Calcula la distancia entre dos polígonos

Ejemplo

SELECT polygonsDistanceCartesian([[[(0, 0), (0, 0.1), (0.1, 0.1), (0.1, 0)]]], [[[(10., 10.), (10., 40.), (40., 40.), (40., 10.), (10., 10.)]]])

14.000714267493642

Parámetros de entrada

Dos polígonos

Valor devuelto

Float64

polygonsEqualsCartesian

Devuelve true si dos polígonos son iguales.

Ejemplo

SELECT polygonsEqualsCartesian([[[(1., 1.), (1., 4.), (4., 4.), (4., 1.)]]], [[[(1., 1.), (1., 4.), (4., 4.), (4., 1.), (1., 1.)]]])

Parámetros de entrada

Dos polígonos

Valor devuelto

UInt8, 0 para false, 1 para true

polygonsSymDifferenceSpherical

Calcula la diferencia simétrica espacial de conjuntos (XOR) entre dos polígonos

Ejemplo

SELECT wkt(arraySort(polygonsSymDifferenceSpherical([[(50., 50.), (50., -50.), (-50., -50.), (-50., 50.), (50., 50.)], [(10., 10.), (10., 40.), (40., 40.), (40., 10.), (10., 10.)], [(-10., -10.), (-10., -40.), (-40., -40.), (-40., -10.), (-10., -10.)]], [[(-20., -20.), (-20., 20.), (20., 20.), (20., -20.), (-20., -20.)]])));

MULTIPOLYGON(((-20 -10.3067,-10 -10,-10 -20.8791,-20 -20,-20 -10.3067)),((10 20.8791,20 20,20 10.3067,10 10,10 20.8791)),((50 50,50 -50,-50 -50,-50 50,50 50),(20 10.3067,40 10,40 40,10 40,10 20.8791,-20 20,-20 -10.3067,-40 -10,-40 -40,-10 -40,-10 -20.8791,20 -20,20 10.3067)))

Parámetros de entrada

Polígonos

Valor devuelto

MultiPolygon

polygonsSymDifferenceCartesian

Igual que polygonsSymDifferenceSpherical, pero las coordenadas están en el sistema de coordenadas cartesianas, que se aproxima más al modelo de la Tierra real.

Ejemplo

SELECT wkt(polygonsSymDifferenceCartesian([[[(0, 0), (0, 3), (1, 2.9), (2, 2.6), (2.6, 2), (2.9, 1), (3, 0), (0, 0)]]], [[[(1., 1.), (1., 4.), (4., 4.), (4., 1.), (1., 1.)]]]))

MULTIPOLYGON(((1 2.9,1 1,2.9 1,3 0,0 0,0 3,1 2.9)),((1 2.9,1 4,4 4,4 1,2.9 1,2.6 2,2 2.6,1 2.9)))

Parámetros de entrada

Polígono

Valor devuelto

MultiPolygon

polygonsIntersectionSpherical

Calcula la intersección (AND) entre polígonos con coordenadas esféricas.

Ejemplo

SELECT wkt(arrayMap(a -> arrayMap(b -> arrayMap(c -> (round(c.1, 6), round(c.2, 6)), b), a), polygonsIntersectionSpherical([[[(4.3613577, 50.8651821), (4.349556, 50.8535879), (4.3602419, 50.8435626), (4.3830299, 50.8428851), (4.3904543, 50.8564867), (4.3613148, 50.8651279)]]], [[[(4.346693, 50.858306), (4.367945, 50.852455), (4.366227, 50.840809), (4.344961, 50.833264), (4.338074, 50.848677), (4.346693, 50.858306)]]])))

MULTIPOLYGON(((4.3666 50.8434,4.36024 50.8436,4.34956 50.8536,4.35268 50.8567,4.36794 50.8525,4.3666 50.8434)))

A diferencia de polygonsIntersectCartesian, acepta cualquier tipo de dato geométrico (Point, MultiPoint, LineString, MultiLineString, Ring, Polygon, MultiPolygon), incluido el tipo común Geometry, y los dos argumentos pueden ser de tipos distintos.

Las coordenadas se expresan en el sistema de coordenadas cartesianas.

Ejemplo

SELECT geometryIntersectCartesian([(2., 2.), (2., 3.), (3., 3.), (3., 2.)]::Ring, [(1., 1.), (1., 4.), (4., 4.), (4., 1.)]::Ring)

Parámetros de entrada

Dos geometrías de cualquier tipo de dato geométrico (o Geometry).

Valor devuelto

UInt8, 0 para false, 1 para true

geometryIntersectSpherical

Devuelve true si dos geometrías se intersecan (comparten algún punto, línea o área).

A diferencia de polygonsIntersectSpherical, acepta cualquier tipo de dato geométrico (Point, MultiPoint, LineString, MultiLineString, Ring, Polygon, MultiPolygon), incluido el tipo común Geometry, y los dos argumentos pueden ser de tipos diferentes.

Las coordenadas se interpretan como si estuvieran sobre una esfera ideal.

Ejemplo

SELECT geometryIntersectSpherical([[[(4.3613577, 50.8651821), (4.349556, 50.8535879), (4.3602419, 50.8435626), (4.3830299, 50.8428851), (4.3904543, 50.8564867), (4.3613148, 50.8651279)]]]::MultiPolygon, (4.36, 50.85)::Point)

Parámetros de entrada

Dos geometrías de cualquier tipo de dato geométrico (o Geometry).

Valor devuelto

UInt8, 0 para false, 1 para true

polygonConvexHullCartesian

Calcula la envolvente convexa. Referencia

Las coordenadas se expresan en un sistema de coordenadas cartesianas.

Ejemplo

SELECT wkt(polygonConvexHullCartesian([[[(0., 0.), (0., 5.), (5., 5.), (5., 0.), (2., 3.)]]]))

POLYGON((0 0,0 5,5 5,5 0,0 0))

Parámetros de entrada

MultiPolygon

Valor devuelto

Polygon

polygonAreaSpherical

Calcula el área de la superficie de un polígono.

Ejemplo

SELECT round(polygonAreaSpherical([[[(4.346693, 50.858306), (4.367945, 50.852455), (4.366227, 50.840809), (4.344961, 50.833264), (4.338074, 50.848677), (4.346693, 50.858306)]]]), 14)

9.387704e-8

Parámetros de entrada

Polygon

Valor devuelto

Float

polygonsUnionSpherical

Calcula la unión (OR).

Ejemplo

SELECT wkt(polygonsUnionSpherical([[[(4.3613577, 50.8651821), (4.349556, 50.8535879), (4.3602419, 50.8435626), (4.3830299, 50.8428851), (4.3904543, 50.8564867), (4.3613148, 50.8651279)]]], [[[(4.346693, 50.858306), (4.367945, 50.852455), (4.366227, 50.840809), (4.344961, 50.833264), (4.338074, 50.848677), (4.346693, 50.858306)]]]))

MULTIPOLYGON(((4.36661 50.8434,4.36623 50.8408,4.34496 50.8333,4.33807 50.8487,4.34669 50.8583,4.35268 50.8567,4.36136 50.8652,4.36131 50.8651,4.39045 50.8565,4.38303 50.8429,4.36661 50.8434)))

Parámetros de entrada

Polígonos

Valor devuelto

MultiPolygon

polygonPerimeterSpherical

Calcula el perímetro del polígono.

Ejemplo

Polygon que representa Zimbabue

Este es el Polygon que representa Zimbabue:

POLYGON((30.0107 -15.6462,30.0502 -15.6401,30.09 -15.6294,30.1301 -15.6237,30.1699 -15.6322,30.1956 -15.6491,30.2072 -15.6532,30.2231 -15.6497,30.231 -15.6447,30.2461 -15.6321,30.2549 -15.6289,30.2801 -15.6323,30.2962 -15.639,30.3281 -15.6524,30.3567 -15.6515,30.3963 -15.636,30.3977 -15.7168,30.3993 -15.812,30.4013 -15.9317,30.4026 -16.0012,30.5148 -16.0004,30.5866 -16,30.7497 -15.9989,30.8574 -15.9981,30.9019 -16.0071,30.9422 -16.0345,30.9583 -16.0511,30.9731 -16.062,30.9898 -16.0643,31.012 -16.0549,31.0237 -16.0452,31.0422 -16.0249,31.0569 -16.0176,31.0654 -16.0196,31.0733 -16.0255,31.0809 -16.0259,31.089 -16.0119,31.1141 -15.9969,31.1585 -16.0002,31.26 -16.0235,31.2789 -16.0303,31.2953 -16.0417,31.3096 -16.059,31.3284 -16.0928,31.3409 -16.1067,31.3603 -16.1169,31.3703 -16.1237,31.3746 -16.1329,31.3778 -16.1422,31.384 -16.1488,31.3877 -16.1496,31.3956 -16.1477,31.3996 -16.1473,31.4043 -16.1499,31.4041 -16.1545,31.4027 -16.1594,31.4046 -16.1623,31.4241 -16.1647,31.4457 -16.165,31.4657 -16.1677,31.4806 -16.178,31.5192 -16.1965,31.6861 -16.2072,31.7107 -16.2179,31.7382 -16.2398,31.7988 -16.3037,31.8181 -16.3196,31.8601 -16.3408,31.8719 -16.3504,31.8807 -16.368,31.8856 -16.4063,31.8944 -16.4215,31.9103 -16.4289,32.0141 -16.4449,32.2118 -16.4402,32.2905 -16.4518,32.3937 -16.4918,32.5521 -16.5534,32.6718 -16.5998,32.6831 -16.6099,32.6879 -16.6243,32.6886 -16.6473,32.6987 -16.6868,32.7252 -16.7064,32.7309 -16.7087,32.7313 -16.7088,32.7399 -16.7032,32.7538 -16.6979,32.7693 -16.6955,32.8007 -16.6973,32.862 -16.7105,32.8934 -16.7124,32.9096 -16.7081,32.9396 -16.6898,32.9562 -16.6831,32.9685 -16.6816,32.9616 -16.7103,32.9334 -16.8158,32.9162 -16.8479,32.9005 -16.8678,32.8288 -16.9351,32.8301 -16.9415,32.8868 -17.0382,32.9285 -17.1095,32.9541 -17.1672,32.9678 -17.2289,32.9691 -17.2661,32.9694 -17.2761,32.9732 -17.2979,32.9836 -17.3178,32.9924 -17.3247,33.0147 -17.3367,33.0216 -17.3456,33.0225 -17.3615,33.0163 -17.3772,33.0117 -17.384,32.9974 -17.405,32.9582 -17.4785,32.9517 -17.4862,32.943 -17.4916,32.9366 -17.4983,32.9367 -17.5094,32.9472 -17.5432,32.9517 -17.5514,32.9691 -17.5646,33.0066 -17.581,33.0204 -17.5986,33.0245 -17.6192,33.0206 -17.6385,33.0041 -17.6756,33.0002 -17.7139,33.0032 -17.7577,32.9991 -17.7943,32.9736 -17.8106,32.957 -17.818,32.9461 -17.8347,32.9397 -17.8555,32.9369 -17.875,32.9384 -17.8946,32.9503 -17.9226,32.9521 -17.9402,32.9481 -17.9533,32.9404 -17.96,32.9324 -17.9649,32.9274 -17.9729,32.929 -17.9823,32.9412 -17.9963,32.9403 -18.0048,32.9349 -18.0246,32.9371 -18.0471,32.9723 -18.1503,32.9755 -18.1833,32.9749 -18.1908,32.9659 -18.2122,32.9582 -18.2254,32.9523 -18.233,32.9505 -18.2413,32.955 -18.2563,32.9702 -18.2775,33.0169 -18.3137,33.035 -18.3329,33.0428 -18.352,33.0381 -18.3631,33.0092 -18.3839,32.9882 -18.4132,32.9854 -18.4125,32.9868 -18.4223,32.9995 -18.4367,33.003 -18.4469,32.9964 -18.4671,32.9786 -18.4801,32.9566 -18.4899,32.9371 -18.501,32.9193 -18.51,32.9003 -18.5153,32.8831 -18.5221,32.8707 -18.5358,32.8683 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Uso de la función polygonPerimeterSpherical

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0.45539

Parámetros de entrada

Valor devuelto

polygonsIntersectionCartesian

Calcula la intersección de polígonos.

Ejemplo

SELECT wkt(polygonsIntersectionCartesian([[[(0., 0.), (0., 3.), (1., 2.9), (2., 2.6), (2.6, 2.), (2.9, 1.), (3., 0.), (0., 0.)]]], [[[(1., 1.), (1., 4.), (4., 4.), (4., 1.), (1., 1.)]]]))

MULTIPOLYGON(((1 2.9,2 2.6,2.6 2,2.9 1,1 1,1 2.9)))

Parámetros de entrada

Polígonos

Valor devuelto

MultiPolygon

polygonAreaCartesian

Calcula el área de un polígono

Ejemplo

SELECT polygonAreaCartesian([[[(0., 0.), (0., 5.), (5., 5.), (5., 0.)]]])

Parámetros de entrada

Polygon

Valor devuelto

Float64

polygonPerimeterCartesian

Calcula el perímetro de un polígono.

Ejemplo

SELECT polygonPerimeterCartesian([[[(0., 0.), (0., 5.), (5., 5.), (5., 0.)]]])

Parámetros de entrada

Polygon

Valor devuelto

Float64

polygonsUnionCartesian

Calcula la unión de polígonos.

Ejemplo

SELECT wkt(polygonsUnionCartesian([[[(0., 0.), (0., 3.), (1., 2.9), (2., 2.6), (2.6, 2.), (2.9, 1), (3., 0.), (0., 0.)]]], [[[(1., 1.), (1., 4.), (4., 4.), (4., 1.), (1., 1.)]]]))

MULTIPOLYGON(((1 2.9,1 4,4 4,4 1,2.9 1,3 0,0 0,0 3,1 2.9)))

Parámetros de entrada

Polígonos

Valor devuelto

MultiPolygon

Para obtener más información sobre los sistemas geométricos, consulta esta presentación sobre la biblioteca Boost, que es la que utiliza ClickHouse.